Reporting Segments (Tables)

6 Months Ended

Jun. 30, 2012

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

Reporting segment data is presented in the following table:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2012			2011			2012			2011
Revenue:
GETS	$	80,762		$	80,169		$	162,037		$	159,166
PSS	175,275			165,170			357,008			327,110
MRI	18,361			17,400			35,980			33,099
Total revenue	$	274,398		$	262,739		$	555,025		$	519,375
Gross profit:
GETS	$	23,454		$	24,699		$	46,701		$	48,644
PSS	23,761			23,876			48,199			46,611
MRI	8,313			8,385			16,313			16,035
Total gross profit	$	55,528		$	56,960		$	111,213		$	111,290
Operating profit:
GETS	$	6,021		$	4,137		$	11,959		$	8,119
PSS	5,069			12,995			10,863			15,193
MRI	2,738			2,477			4,991			4,238
Corporate	(5,964		)	(5,905		)	(12,560		)	(11,093		)
Total operating profit	7,864			13,704			15,253			16,457
Other income (expense), net	(80		)	(116		)	(118		)	(159		)
Income before income taxes	$	7,784		$	13,588		$	15,135		$	16,298

Reporting segment asset data is presented in the following table:

	June 30,		December 31,
	2012		2011
Assets:
GETS	$	132,019	$	130,730
PSS	181,478		162,835
MRI	29,172		28,697
Corporate	41,310		68,434
Total assets	$	383,979	$	390,696